the images are published under public domain by the United States Geological Survey
USGS
USA, Midwestern USA
Carboniferous
Fusulinella imprima | Fusulinella imprima | Fusulinella imprima | Fusulinella imprima | Profusulinella ohioensis | Profusulinella ohioensis |
USA, Midwestern USA
Carboniferous
Moellerites kentuckyensis | Moellerites kentuckyensis | Moellerites kentuckyensis | Moellerites kentuckyensis | Moellerites kentuckyensis |